The previous patch added a new test exercising a race condition which
was fixed earlier in the series. Similarly to other tests in this file,
the new test should not run while bpf_refcount_acquire is disabled as it
requires that kfunc.
Signed-off-by: Dave Marchevsky <davemarchevsky@xxxxxx>
---
.../bpf/prog_tests/refcounted_kptr.c | 100 ------------------
1 file changed, 100 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c b/tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c
index e7fcc1dd8864..6a53f304f3e4 100644
--- a/tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c
+++ b/tools/testing/selftests/bpf/prog_tests/refcounted_kptr.c
@@ -18,103 +18,3 @@ void test_refcounted_kptr_fail(void)
{
RUN_TESTS(refcounted_kptr_fail);
}
-
-static void force_cpu(pthread_t thread, int cpunum)
-{
- cpu_set_t cpuset;
- int err;
-
- CPU_ZERO(&cpuset);
- CPU_SET(cpunum, &cpuset);
- err = pthread_setaffinity_np(thread, sizeof(cpuset), &cpuset);
- if (!ASSERT_OK(err, "pthread_setaffinity_np"))
- return;
-}
-
-struct refcounted_kptr *skel;
-
-static void *run_unstash_acq_ref(void *unused)
-{
- LIBBPF_OPTS(bpf_test_run_opts, opts,
- .data_in = &pkt_v4,
- .data_size_in = sizeof(pkt_v4),
- .repeat = 1,
- );
- long ret, unstash_acq_ref_fd;
- force_cpu(pthread_self(), 1);
-
- unstash_acq_ref_fd = bpf_program__fd(skel->progs.unstash_add_and_acquire_refcount);
-
- ret = bpf_prog_test_run_opts(unstash_acq_ref_fd, &opts);
- ASSERT_EQ(opts.retval, 0, "unstash_add_and_acquire_refcount retval");
- ASSERT_EQ(skel->bss->ref_check_3, 2, "ref_check_3");
- ASSERT_EQ(skel->bss->ref_check_4, 1, "ref_check_4");
- ASSERT_EQ(skel->bss->ref_check_5, 0, "ref_check_5");
- pthread_exit((void *)ret);
-}
-
-void test_refcounted_kptr_races(void)
-{
- LIBBPF_OPTS(bpf_test_run_opts, opts,
- .data_in = &pkt_v4,
- .data_size_in = sizeof(pkt_v4),
- .repeat = 1,
- );
- int ref_acq_lock_fd, ref_acq_unlock_fd, rem_node_lock_fd;
- int add_stash_fd, remove_tree_fd;
- pthread_t thread_id;
- int ret;
-
- force_cpu(pthread_self(), 0);
- skel = refcounted_kptr__open_and_load();
- if (!ASSERT_OK_PTR(skel, "refcounted_kptr__open_and_load"))
- return;
-
- add_stash_fd = bpf_program__fd(skel->progs.add_refcounted_node_to_tree_and_stash);
- remove_tree_fd = bpf_program__fd(skel->progs.remove_refcounted_node_from_tree);
- ref_acq_lock_fd = bpf_program__fd(skel->progs.unsafe_ref_acq_lock);
- ref_acq_unlock_fd = bpf_program__fd(skel->progs.unsafe_ref_acq_unlock);
- rem_node_lock_fd = bpf_program__fd(skel->progs.unsafe_rem_node_lock);
-
- ret = bpf_prog_test_run_opts(rem_node_lock_fd, &opts);
- if (!ASSERT_OK(ret, "rem_node_lock"))
- return;
-
- ret = bpf_prog_test_run_opts(ref_acq_lock_fd, &opts);
- if (!ASSERT_OK(ret, "ref_acq_lock"))
- return;
-
- ret = bpf_prog_test_run_opts(add_stash_fd, &opts);
- if (!ASSERT_OK(ret, "add_stash"))
- return;
- if (!ASSERT_OK(opts.retval, "add_stash retval"))
- return;
-
- ret = pthread_create(&thread_id, NULL, &run_unstash_acq_ref, NULL);
- if (!ASSERT_OK(ret, "pthread_create"))
- goto cleanup;
-
- force_cpu(thread_id, 1);
-
- /* This program will execute before unstash_acq_ref's refcount_acquire, then
- * unstash_acq_ref can proceed after unsafe_unlock
- */
- ret = bpf_prog_test_run_opts(remove_tree_fd, &opts);
- if (!ASSERT_OK(ret, "remove_tree"))
- goto cleanup;
-
- ret = bpf_prog_test_run_opts(ref_acq_unlock_fd, &opts);
- if (!ASSERT_OK(ret, "ref_acq_unlock"))
- goto cleanup;
-
- ret = pthread_join(thread_id, NULL);
- if (!ASSERT_OK(ret, "pthread_join"))
- goto cleanup;
-
- refcounted_kptr__destroy(skel);
- return;
-cleanup:
- bpf_prog_test_run_opts(ref_acq_unlock_fd, &opts);
- refcounted_kptr__destroy(skel);
- return;
-}
--
2.34.1
